Combustion-engine



NINE 22, i515,

APPLICATION HLED www: A

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'WLELAM T. PRESE, 0L EE'W ,URCHELLE NEW YORK, ASSXGNOR TO DE LA VERGNEMBMY, 0F NEVI YORK, N. Y.; A CORPORATION OF NEW YORK.

COMBUSTION-ENGINE.

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application filed June 22, 1915.

fi/'nitraat 'l'. Pinon, a subject of the King of Great Britain, residingat 129 Sickels avenue,

- New doehelie, N. Y., have invented the fol- -lowinwdescribedimprovements in Combus tion-llingines.

The purpose of the structure incorporating these improvements is toavoid the escape into the surrounding atmosphere of smoke or combustionproducts or lubricating oil at the crank end of the cylinder and toadapt the engine to consume the objectionable gases whiclrwould normallyfind egress at this region. These objects are accomplished by simplemechanism, capable of application to various types of engines, at smallexpense and `without interference with other parts, and which provides aconstantly opencomi niunication between the cranlr space inclosure andthe atmosphere, allowino' the air to be moved back and forth therein bythe to and fro motion of the piston but without opportunity for theescape of smoke except to the engine itself or to some other suitableplace of disposal.

in the accompanying drawings forming a part hereof:

Figure 1 is a longitudinal section through -a horizontal four-cycleengine (although any other cycle engine may be used) embodying theinvention, the varrows indicating the direction of movement on thefiring stroke.

l? 2 is a c oss-section on the line 2-2 of 1; and Figs. 8, if and 5 arediagrammatic views, representing the sequence of operation on thecompression, exhaust and intake strokes respectively.

The invention designed more especially ifor stationary horizontalfour-cycle and twocycle engines, and the drawing illustrates a singlefourcycle cylinder engine of this character, but Vwithout limitationthereto.

The cylinder marked 6 is carried on a bed frame 7, resting on afoundation S, and at its inner end is provided 'with a combustion airvalve 9an exhaust valve 1() controlling the exhaust passage 11, astarting air valve 12,

` between the two and in line with the axis of thepiston, and a fuelvalve 13 cross-wise of such axis. The valves as thus arranged conroi acombustion space 14 between them .which in turn communicates with thein- Jcrior of the cylinder proper. ln this .par

Specication of Letters Patent.

Patented Aug. 31, 1920.

Serial No. 35,498.

ticular type of engine the fuel lvalve sprays .liquid fuel into a bodyof air compressed in the space 14C and the products of combustion expandagainst the piston 17 producing'mo tion of the latter in the usual Way.As already indicated, however, the design and type of the engine are notmaterial to this invention except as hereinafter specified. In this, asin other types of engines, there is some leakage of combustion gasespast the piston onthe firing stroke, which leakage naturally increaseswith the Wear of the'piston rings and there is also some burning of thecylinder lubricating. oil from the heat of the combustion on the surfaceof the piston 70 and from engine lubricating oil splashed into the hotinterior of the piston resulting in the escape at the crank case ofillsmelling and more or less poisonous vapors which contaminate the airof the engine room. Furn tliermore, lubricating oil suspended in the airin I'ine particles is carried out intothe room with the displaced airand gases. .'ccordingto this invention, the crank 15 and its connectingrods 16 are inclosed in a casing formed in part by the engine bed 7beyond the cylinder and thecrank shaft journals and in part by a cover18 fitted to such bed and connected with the outer end of the cylinderby a hood 19. '1 he mode of operation, as hereinafter explained, permitsthe cover 18 and associa-ted inclosing necessary. The two 'spaced sheetmetal 10,0

wa-lls,23 and 24 forming thetiansversev members Aof the cover areeachyq/curved'approximately. concentric to the crankshaft and held inproper relative position by appropriate angle connections to theAvvertical 105 side walls 25, as indicated in Fig. 1. The outer wall 23has an opening 27 formed therein at about the top of the curvature 1nthe present case, and ythe space between the two walls 23 and 24 formsanpassage 110 which connects this opening with a second opening 28through or around vthe rear end ofthe wall 24 and with two otheropenings 29 at the front end of the said innenwall. These openings 29are formed by an interposed U' shaped battle wall 30 embracing the spacein which the connecting rod 16 travels, such wall being connected to thecover walls 23 and 24 in suitable manner as indicated in Figs. l and 2.The crank space of the engine is thus put into indirect communication bymeans ofvtwo relatively remote openings (28 and 29) with the surroundingoutside air, such communication being constantly open as indicated. Thisarrangement of portsand passage provides a relatively long patli'foi thecontents of the casing to follow in order to escape to the vengine roomand is leiective in confining 'the smoke-and gases, although it permitsthe air therein to surge 'back and orth as the piston reciprocates: Ageneral flow of `-air is induced inthe inclosed crank space suiiicientto keep the net movement inward,

by means of a connection between the crank case and the air valve 9.'This connection is formed by a passage 3l communicating with the saidcrank As pace'through two lateral openings on either side of theconnect- 'ing rod'indicated at 32 and als communicating with anout-ta'kepassage 33,' which is connected by a pipe 3a with the housing of the airintake .valve 9. The relative vacuum produced' by the suction of thepiston 17 in due course.

draws air, and such smoke as it may contain,'through this passage' andinto the cylinder, whence it is discharged to the exhaust l :in thepassage S1- arrd the silencing intake pipe with its slotted openings 37admits more or lless 'outside air to the passage 31 and maybe gaged sothat the general movei ment through the crank-case and toward the l`.intake pipe '36.

intake valve shall be as strong as may be necessary. l

vIn operation and by reason 'of the length of the crank spacelpassage'26, no smoke issues `from the latter on the tiring stroke. Asmall portion of the gas may 'pass through opening 32 andfroin passage3l some may be displaced downward into intake' pipe 36,

1 e none escapes through the openingsl 37, pgn the inward or exhauststroke air is ,drawn into the passage 26 and ,part is drawn'back throughpassage 32, 3l and upward thi'oi h Durin e'. e., the suction stroke o'the engine, the air valve 9 being open, thc'contents of the crankAspace move .through passa e 32 toward suchvalve and air is drawn inreely through intake pipe 36. During this operation there. may becomparatively little movement of air through ,the passage 26 dependingupon the relative proportions of the various pas7 The opening 35,provided intima has now been described in' detail, it willbe .f

understood thatY numerous changes and modifications are possible andwithin its scope. Thus, rfor example, the number of wallsv 23 and 24 andthe length of the passage between them may be changed or increased andother means may be employed for producing the inward advance of thesurging currents therein.

Intake pipe 36 and opening 35 may be entirely eliminated thus causingall the air for combustion to be drawn in through I opening 27 andpassages 26 and moreover I do not confine my invention entirely tointcrnal combustion engines as the cover may be used to advantage on aircompressors `and other machines of the single acting. type.

l/Vhat is claimed as new is:

1. ln an internal combustion engine, cylinder provided with an admissionport, combined with a crank inclosure communicating with theouter end ofthe cylinder and formed with an ,intervening space affording i aconstantly open .passage cqmmunicatingat reinotepoints on the one'handwith the interior of the inclosure and on the otherhand with theatmosphere, and means for transferring air from the interiorof the' inlclosure to said admission port.

2.111 an internal combustion engine, the combination with a cylindercontaining a piston, intake and exhaust valves operating on afour-stroke cycle, of an inclosure at the crank end of the cylinderhaving a relatively long circuitous' communication withH the atmosphere,and a passage leading from the Ainterior of said inclosuie to said air,intake valve.

lnV an internal combustion engine, a crank inclosure having double wallsVwith oiset ports' communicating respectively with the crank lspaceand'with the atmosphere and afl'ordin a circuitous passageway con-vstantl open/to-oscillatory air movement.l

4. n an internal combustion engine, the

combination Iof a'cylinder, a crank'space cover having spacedwwalls.provided with iis openings so arranged as to afford'a relai tively longpassageway between said space and the atmosphere, said passageway beingconstantly Yoperrwith respect to air movethe next stro e,

ment in both directipns, and a means for withdrawing the gaseouscontents of said space to cause a net flow, through 'saidh'communication toward the interior of said space.`

5. In an internal combustion engine, 'a horizontal cylinder having anintake at its inner end, a bed frame containing an air passage leadingto said intake, and a'crank inclosure at the outer end ofthe cylinder ofthe cylinder having a passage space intervenin'gf/jbetween its interiorand the atmosphereg'fa passage beneath the'cylinder connectin theinterior of the crank inclosure with said air intake port, and means forad- ,Y mitting air to said intake port independently of the crankinclosure,through a passage of substantial length.

7. In an internal combustion engine, the combination with a horizontalcylinder and piston, of a crank space inclosure compris. ing a coverconstituted of spaced arched walls forming a passageway having an.opening to the atmosphere toward the top and openings to the interior ofthe crank space at or near the ends.

8. In an internal combustion engine, a horizontal cylinder having airadmission means at its inner end, a crank space inclosure comprisingspaced walls forming a passageway open at or near the top to theatmosphere and at lower points having openings to the crank space, and apassage 'for conducting the contentsl of the crank space to the said airadmission means.

9. In an internal combustion engine, the

lcombination with a cylinder, a double- Walled inclosure for the crankthereof having a passage constantly open to air moven ment in bothdirections, curved concentrically to the crank shaft, and through whichtheinterior of the inclosure is in communication with the atmosphere. I

10. In an internal combustion engine, the combination with the engineair intake port and a crank'inclosuregnormally open to atmosphere andprovided with an vair passage leading to said port, of an auxiliary v'air inlet for leading outside air to said air passage.

1l. In an internal combustion engine, the combination with the engineair intake port, a c'rankinclosure having a constantly open circuitous`communication with the atmosphere andp an air 'passage connecting suchinclosure with the intake port, of an auX- iliary airlinlet provided.withv a series of vslits through which outside air may pass to said airpassage.

l2. In an internal combustion engine, the combination with theairvintake port thereof, a crank inclosure having open communi= cation withatmosphere, a constantlyopen passage through which air from theinclosure is drawn tothe said port, and 'a constantly open auxiliary airinl-et for admitting outside air to said passage, the said passagesbeing arranged and adapted to prevent escape of the crank inclosureodors or gases into the surrounding atmosphere.

yIn testimony whereof, I have signed this specication in the presence oftwoI witnesses.

l WILLIAM T. PRICE.

Witnesses LOLLIE STEINBERG, CHAS. FRoEHLIoH,

